Answer = 5,050. (n)( n+1)/2 where n = 100. (100 x 101) / 2 = 5,050
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Sum of first n natural numbers is (n) x (n + 1)/2 Here we have the sum = 100 x (101)/2 = 50 x 101 = 5050
The sum of the whole numbers from 1 to 100 inclusive is 5,050.
s100=50(2+99) this is because a=1, d=1 and n=100. answer is 5050
The sum of all the odd numbers from 1 through 100 is 10,000
n*(n+1)=sum 100*(100+1)=10100